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Air and Fuel› Fuel Injection Systems and Components - Electronic

APR

ECU Upgrade 2.5T H4 Engine

Name: ECU Upgrade 2.5T H4 Engine
Brand: APR
SKU: APR-DPP-718-S-2.5T

$1,699.95 $1,484.06 Save $215.89

SKU: APR-DPP-718-S-2.5T

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$100 Minimum Order

Non-Returnable Item

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Professional / shop required

Overview

The APR ECU Upgrade is a software modification designed for the Porsche 982 718 Cayman and Boxster S models with the 2.5T H4 engine. It dramatically increases horsepower and torque. This upgrade is considered a significant modification for enhancing vehicle performance.

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The APR ECU Upgrade is a performance-enhancing software modification specifically engineered for the Porsche 982 718 Cayman and Boxster S equipped with the 2.5T H4 engine. This upgrade dramatically increases both horsepower and torque, making the vehicle significantly quicker and more exciting to drive. It is recognized as one of the most impactful dollar-per-horsepower modifications available for the 2.5T engine. Extensive testing on the street, dyno, and track is conducted by APR to ensure the ECU upgrades function flawlessly and deliver reliable performance. The APR Plus option includes a limited powertrain warranty that matches the factory term limit while providing the same performance output as the Stage 1 91 AKI ECU Upgrade. Users have reported noticeable improvements in acceleration and overall power delivery after installation, with tires breaking loose more easily in lower gears and a significantly stronger pull. This ECU upgrade is compatible with the Porsche 718 Boxster S H4 2.5L and Porsche 718 Cayman S H4 2.5L. Some users have reported varied experiences, with one user noting dissatisfaction with the results on a 2019 718 Cayman GTS 2.5T, feeling their horsepower remained at stock levels. However, other user experiences highlight a substantial increase in performance and a more engaging driving experience.

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

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Specifications

Brand	APR
Part Number	APR-DPP-718-S-2.5T
Category	Air and Fuel

Videos

APR Porsche Program Tech Talk

APR Tune Review 718 Cayman S (Includes Q&A Discussion)

718 Cayman S APR Performance Tune My Thoughts After Over 1 Year of Tuning My Car

APR ECU Calibration Tech Talk with Eric Urness

APR Tuned 718 Cayman S Hard Pull POV

APR 718 (982) 2.0T/2.5T Catback Exhaust Suite!

Porsche Cayman S 718 st.1 APR dyno

2018 718 Cayman GTS (APR TUNED 406whp!!!)

APR Porsche 991.2 ECU Upgrades Now Available!

Porsche 718 GTS Jb4 vs APR Stage 1 Tune Dyno Test Comparison

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Returns & Fitment

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

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